Answer / piyush

Ans (a) somewhat effective as in 8 patients improved while
in other only 2 improved.
(b) Basically ineffective because difference
between improved and unimproved where 6 and 4 respectively.
(c) Basically ineffective because in the control
group, also 2 patients improved without taking any medicine.
(d) Somewhat effective because 40% of the students
improved in medication (8/20), and only 20% improved in case
of control (2/10).

Answer / sundaravalli

I think so its option d

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